yum_versionlock: adjust docs (#9280)

* yum_versionlock: adjust docs

* fix examples indentation

plugins/modules/yum_versionlock.py

@@ -8,8 +8,7 @@
 from __future__ import absolute_import, division, print_function
 __metaclass__ = type
 
-DOCUMENTATION = r'''
----
+DOCUMENTATION = r"""
 module: yum_versionlock
 version_added: 2.0.0
 short_description: Locks / unlocks a installed package(s) from being updated by yum package manager
@@ -45,9 +44,9 @@ requirements:
 author:
   - Florian Paul Azim Hoberg (@gyptazy)
   - Amin Vakil (@aminvakil)
-'''
+"""
 
-EXAMPLES = r'''
+EXAMPLES = r"""
 - name: Prevent Apache / httpd from being updated
   community.general.yum_versionlock:
     state: present
@@ -73,9 +72,9 @@ EXAMPLES = r'''
   community.general.yum_versionlock:
     state: absent
     name: httpd
-'''
+"""
 
-RETURN = r'''
+RETURN = r"""
 packages:
   description: A list of package(s) in versionlock list.
   returned: success
@@ -87,7 +86,7 @@ state:
   returned: success
   type: str
   sample: present
-'''
+"""
 
 import re
 from ansible.module_utils.basic import AnsibleModule